Insulating-joint



(N; M51. v

- S. W. BURTGHAELL.

[INSULATING JOINT. No. 506,034

Patented Oct. 3, 1893.-

UNITED-l STATES s'AMUEL. W. BURTOIIAELL, OF

PATENT O FICE. n

SAN FRANcIsoo, CALIFORNIA.

lNSULATlNG -JO|NT.

, SPECIFICATION forming part of Letters Patent No. 506,084, datedOctober 3, 1893.

Application filed June 20, 1892.

-T0 all'whom it may concern:

Be it known that I, SAMUEL W. BURTCH- AELL, a citizen ofth'e UnitedStates, residing in the city and countyof San Francisco, State ofCalifornia, have invented an Improvement in Insulating-Joints;.and Ihereby declare the following to be a full, clear, andexact descriptionof the same. My invention relates to the class of-insulating joints.especially adapted for connecting gas fixtures with the house pipes, andat l the same time insulating them to provide for the'attachment to saidfixtures of electric lighting apparatus. Q

invention consists in-thenovel joint hereinafter fully described andspecifically claimed. Y The object of my invention is toprovide a simpleand effective insulating joint, the es-- sential advantage of which lies'inits non-rotatability. I

Referring to the accompanying drawings for a. more completeexplanationof ymy' in- =vention,.Figure 1 is a vertical sectionot my,

insulating jointi Fig. 2 is a perspectijze'yiew showing the severalparts separated and about to be put together. i

The joint consists of four parts, to wit, the

section Aadapted to be secured to the projecting end of the house pipe;the section B to which the gas fixture is secured; the connecting nut Oand suitable insulating material to be more fully described. The sectionA is a tubular piece of metal provided at its upper end with internalthreads a and at its lower end with the enlarged externallyt'hreadedportion a.

Section B consists of a tubular metallic piece having projectingqfromits head a reduced internally threaded neck b.

The connecting nut O is an annular piecegof metal internally threaded atits upper end,

and having an inwardly projecting flange c at its lower end. The'sectionA is secured to the house pipe D by screwing its upper end thereon. Thesection B has the chandelier pipe E securedLto it by screwing into itsinternally threaded neck; 'lhe'sectio'ns A and a B are unitedby havingthe connecting nut nall-y threaded upper end screwing on to the fittingover section B,.its flange 0 being limited by the head of said section,and its interenlarged externally threaded lower end of Serial No.437.384. (No model.)

.sulated from each other.

in any suitable manner. I have here shown an apertured disk F of leatherorother suitapertured disk G of mica.v Awasher'Hof intending flange c onthe lowerend of theconsulated from each other, and the connecting Inpractice it is a difificult matter with such tion from tnrning'ontheupper section. This is not perfect without some means of remetween thetwo sections may be of any suit+ able formof projection on one section,entermg acorresponding groove or socket .onlthe immaterial nponwhichsection the projecsection B is formed or provided acorrespondvingconcave or socket J, thedepressed portion or sockettraversing the'central portion ing side wings orwallsxJ adapted to enterthe spaces at the sides of the convex projecparts are fittedtogether,thereby causing'an providing-an eitective means for preventingsulatin g material is seated between the back; of the head of section Band the inwardly exdying thisdifficu1ty. Ihave accordingly providedforsuch an engagement between the' adjacent ends of sections A and-B aswill prevent section B from'turning on. section A -as'it would do if theadjacent ends were simple plain surfaced onesij This 'CQHDGOtiOll'bQ'tion may be, or on which the groove maybe. i I have hereshownl'as the'bestfhrmthegup vper section A as having formed with ne vided on itslower end a convex projection 1,,

section A. These parts are to be suitably ini This may be done ablematerial fitted against the lower end of section. A, a similar disk Ffitted against the upper end of section B, and an intervening neotingnot 0. Thus the two sections are innut which is incontact with the uppersection' A is insulated from the lower section B.

a coupling or joint to prevent the lower secis a serious disadvantagerequiring constant attention to set them up closely, and the j ointothersection. v The form of these projections and grooves is immaterial, andit is likewise I and up'on'the upper end or'head of the lower Y of thepiece so as to leave upwardly p'rojec'tmo tion of the piece or sectionA, when the two interlocking of said sections A and B, and

the turning of one section on the other. 'The insulating materialconforms to'these shapes and when the securing nut is tightened up, theconvex projection on the one part fits down into the concave socket onthe other of it, and the other section having the central portion of itsadjacent end depressed and bounded by projecting wings or walls adaptedto enter the spaces provided atthe sides of the convex projection of theother section, to prevent the turning of one section on the other, awasher interposed and adapted to conform to the interlocking meetingsurfaces of the opposing sections, and means insulated from one of saidsections for connecting them, substantially as herein described.

In witness whereof I have hereunto set my hand.

SAMUEL W. BURTOHAELL. Vtitnesses:

J. W. KEYS, WALTER A. CLARK.

